Provide functions to check for CPU topology information:
- the number of sockets on sbsa-ref platform.
- the number of clusters in one socket.
- the number of cores in one cluster.
- the number of threads in one core.
As SMC calls can return up to 4 return values, the number of sockets,
clusters and cores are read from TF-A using platform specific SMC call.
Number of threads is caluculated using the cpu count and the number of
sockets, clusters and cores.
Signed-off-by: Xiong Yining <xiongyining1...@phytium.com.cn>
Signed-off-by: Marcin Juszkiewicz <marcin.juszkiew...@linaro.org>
---
.../SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h | 1 +
.../Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h | 26 +++++++++++++++
.../SbsaQemuHardwareInfoLib.c | 35 ++++++++++++++++++++
3 files changed, 62 insertions(+)
diff --git a/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
b/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
index af6b120561ad..b57573735ace 100644
--- a/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
+++ b/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
@@ -16,6 +16,7 @@
#define SIP_SVC_GET_GIC_ITS SMC_SIP_FUNCTION_ID(101)
#define SIP_SVC_GET_CPU_COUNT SMC_SIP_FUNCTION_ID(200)
#define SIP_SVC_GET_CPU_NODE SMC_SIP_FUNCTION_ID(201)
+#define SIP_SVC_GET_CPU_TOPOLOGY SMC_SIP_FUNCTION_ID(202)
#define SIP_SVC_GET_MEMORY_NODE_COUNT SMC_SIP_FUNCTION_ID(300)
#define SIP_SVC_GET_MEMORY_NODE SMC_SIP_FUNCTION_ID(301)
diff --git a/Silicon/Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h
b/Silicon/Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h
index e5076274fa0a..7e0bd962f8a9 100644
--- a/Silicon/Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h
+++ b/Silicon/Qemu/SbsaQemu/Include/Library/HardwareInfoLib.h
@@ -15,6 +15,19 @@ typedef struct {
UINT64 AddressSize;
} MemoryInfo;
+/**
+ Sockets: the number of sockets on sbsa-ref platform.
+ Clusters: the number of clusters in one socket.
+ Cores: the number of cores in one cluster.
+ Threads: the number of threads in one core.
+**/
+typedef struct {
+ UINT32 Sockets;
+ UINT32 Clusters;
+ UINT32 Cores;
+ UINT32 Threads;
+} CpuTopology;
+
/**
Get CPU count from information passed by Qemu.
@@ -83,4 +96,17 @@ GetNumaNodeCount (
VOID
);
+/**
+ Get cpu topology (sockets, clusters, cores, threads) from TF-A.
+
+ @param [out] CpuTopo A pointer to the cpu topology.
+
+
+ @retval the information of cpu topology.
+**/
+VOID
+GetCpuTopology (
+ OUT CpuTopology *CpuTopo
+ );
+
#endif /* HARDWARE_INFO_LIB */
diff --git
a/Silicon/Qemu/SbsaQemu/Library/SbsaQemuHardwareInfoLib/SbsaQemuHardwareInfoLib.c
b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuHardwareInfoLib/SbsaQemuHardwareInfoLib.c
index 05b6fca9e538..b8d1abe2d0bc 100644
---
a/Silicon/Qemu/SbsaQemu/Library/SbsaQemuHardwareInfoLib/SbsaQemuHardwareInfoLib.c
+++
b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuHardwareInfoLib/SbsaQemuHardwareInfoLib.c
@@ -8,6 +8,7 @@
**/
#include <Library/ArmSmcLib.h>
+#include <Library/ArmMonitorLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/ResetSystemLib.h>
@@ -181,3 +182,37 @@ GetNumaNodeCount (
return NumberNumaNodes;
}
+
+/**
+ Get CPU topology.
+**/
+VOID
+GetCpuTopology (
+ OUT CpuTopology *CpuTopo
+ )
+{
+ ARM_MONITOR_ARGS SmcArgs;
+
+ SmcArgs.Arg0 = SIP_SVC_GET_CPU_TOPOLOGY;
+ ArmMonitorCall (&SmcArgs);
+
+ if (SmcArgs.Arg0 != SMC_SIP_CALL_SUCCESS) {
+ DEBUG ((DEBUG_ERROR, "%a: SIP_SVC_GET_CPU_TOPOLOGY call failed. We have no
cpu topology information.\n", __FUNCTION__));
+ ResetShutdown ();
+ } else {
+ CpuTopo->Sockets = SmcArgs.Arg1;
+ CpuTopo->Clusters = SmcArgs.Arg2;
+ CpuTopo->Cores = SmcArgs.Arg3;
+ CpuTopo->Threads = SmcArgs.Arg4;
+ }
+
+ DEBUG ((
+ DEBUG_INFO,
+ "%a: CPU Topology: sockets: %d, clusters: %d, cores: %d, threads: %d\n",
+ __FUNCTION__,
+ CpuTopo->Sockets,
+ CpuTopo->Clusters,
+ CpuTopo->Cores,
+ CpuTopo->Threads
+ ));
+}
--
2.45.2
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